A number of Bay Area residents were among the thousands of runners and spectators in the streets of Boston today when two deadly explosions went off near the Boston Marathon's finish line.

One of the top finishers, Daniel Tapia, 26, of Castroville, said he had finished running the 26.2-mile course around noon Boston time and had gone into the Fairmont Copley Plaza hotel near the finish line to grab a snack and recover.

Bay Area Goes on Heightened Alert Following Boston Blasts

The Warriors and the A's play in Oakland tonight. Cheryl Hurd talks about the heightened security fans may see at the games as well as other locations around the Bay Area following the attacks in Boston. (Published Monday, April 15, 2013)

He said he was inside the hotel when he heard what sounded like a loud pop. Hotel staff turned on the TVs as emergency personnel told hotel patrons to stay inside. "I haven't left the room that I'm in," he said early this afternoon. Tapia placed ninth in the marathon, according to the race's website.

Berkeley resident Lucretia Ausse, 54, was about to receive her medal after finishing the race in just over four hours when she heard an explosion and saw a plume of smoke.

Photos: Boston Marathon Blasts

About 10 seconds later, she heard a second blast. "I thought it was a water cannon," she said this afternoon, "I thought that was odd." She soon realized something serious was happening. "There was definitely fear and panic in the crowd," she said.

She was able to get her gear from a tent where her cellphone was, but she was unable to connect with her partner, who was on the subway trying to meet up with her at the finish line. Today is a holiday in Massachusetts -- Patriots' Day -- and the subway was packed, Ausse said.

She said a frantic 30 minutes passed before they were able to meet up safely and return to their Beacon Hill bed and breakfast, where she said everyone is hunkering down, watching the news closely and following police orders.

"It was a very terrifying and saddening experience," said Ausse, who has run five marathons. "For this to occur at this event is enormously frightening."

She said fellow runners, who come from around the world for the storied race, are shaken up. "It's just starting to hit me what happened," she said.

San Francisco native and Berkeley resident Andrew Batjiaka, 25, had finished the race an hour before the blasts happened and had left the downtown area when he heard about the explosions.

He was able to return to a home in the city's Allston neighborhood where he is staying with friends. Batjiaka said his sense of accomplishment and well-being after the marathon quickly turned to horror when he heard the news.

"I was super happy when I finished the race," Batjiaka said. He said his Boston friends have offered to host fellow marathon runners stranded in the city. Hundreds of similar offers have been made on a growing Google Document list titled "Need a place to stay - Boston Marathon explosion."